Biotropica最新文献_第6页

Tropical Bee Assemblage Diversity Decreases With Elevation While Body Size Increases 热带蜜蜂群落多样性随海拔升高而降低，而体型增加

IF 1.7 3区环境科学与生态学

Biotropica Pub Date : 2026-06-10 DOI: 10.1111/btp.70220

Nash E. Turley, Harold Pulido-Guarín, Daniel Nossa-Suárez, Gabriella Hoffmann, Ruben D. Martín-Rojas, Lucia Aguilar-Benavides, Margarita M. López-Uribe

{"title":"Tropical Bee Assemblage Diversity Decreases With Elevation While Body Size Increases","authors":"Nash E. Turley, Harold Pulido-Guarín, Daniel Nossa-Suárez, Gabriella Hoffmann, Ruben D. Martín-Rojas, Lucia Aguilar-Benavides, Margarita M. López-Uribe","doi":"10.1111/btp.70220","DOIUrl":"https://doi.org/10.1111/btp.70220","url":null,"abstract":"Elevation gradients are powerful drivers of changes in species composition, richness, and functional traits. We studied bee communities at 14 sites across a 3000 m elevational gradient in the Colombian Andes. We measured morphological traits on all individuals (body size, relative leg length, relative wing length) and used assemblage data to measure composition, richness, evenness, Simpson's diversity, and trait diversity. We found that assemblage composition turned over rapidly with sites greater than 1000 m in elevation apart, sharing less than 1% of species. Bee richness decreased with elevation, with low elevation sites (< 2000 m) having an average of 26 species and high elevation sites (> 3000 m) averaging 3.4 species. Simpson's diversity and trait diversity showed similar patterns, while evenness did not change with elevation. Assemblage trait means also changed with elevation, as high elevation communities had larger body sizes and shorter wings and legs. These results fit with predictions from both Bergmann's and Allen's rules, suggesting thermoregulation may be a factor driving changes at high elevation. This is the first study of its kind in the Andes and adds to a large number of bee assemblage studies that also show decreases in bee diversity with elevation, indicating that it is a near-universal pattern. However, results from the small number of existing studies on bee morphological trait changes with elevation are highly variable, suggesting these changes have a variety of mechanisms driving them and are likely context dependent.","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"58 4","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/btp.70220","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148237785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ecological Plasticity Explains the Distribution of Sympatric and Allopatric Mouse Lemurs (Microcebus spp.) in Northeastern Madagascar 生态可塑性解释了马达加斯加东北部同域和异域鼠狐猴的分布

IF 1.7 3区环境科学与生态学

Biotropica Pub Date : 2026-06-09 DOI: 10.1111/btp.70225

Dominik Schüßler, Tobias van Elst, Naina R. Rabemananjara, Tahiriniaina Radriarimanga, Stephan M. Rafamantanantsoa, Roger D. Randimbiharinirina, Emmanuel Rasolondraibe, Jasmin Mantilla-Contreras, Ute Radespiel

{"title":"Ecological Plasticity Explains the Distribution of Sympatric and Allopatric Mouse Lemurs (Microcebus spp.) in Northeastern Madagascar","authors":"Dominik Schüßler, Tobias van Elst, Naina R. Rabemananjara, Tahiriniaina Radriarimanga, Stephan M. Rafamantanantsoa, Roger D. Randimbiharinirina, Emmanuel Rasolondraibe, Jasmin Mantilla-Contreras, Ute Radespiel","doi":"10.1111/btp.70225","DOIUrl":"https://doi.org/10.1111/btp.70225","url":null,"abstract":"Species distributions are shaped by complex biotic and abiotic interactions, which are often not fully understood. We investigated the ecological basis of co-occurrence and distribution of four partially sympatric and allopatric cryptic mouse lemur species (Microcebus spp.) in the Ambatosoa and Analanjirofo region of northeastern Madagascar. Using structural habitat characteristics, adaptability to habitat degradation, bioclimatic niches, and morphology (incl. body mass variability), we estimated n-dimensional hypervolumes of niche sizes and overlaps. M. jonahi and M. simmonsi were found almost equally often in forest- and fallow-derived habitats (52% and 58%, respectively), while M. lehilahytsara predominantly occupied fallow habitats (71%) that result from shifting cultivation practice. M. lehilahytsara exhibited the largest niche and range size, followed by M. jonahi and M. simmonsi. M. jonahi and M. simmonsi displayed significant fat deposition before the austral winter, indicating heterothermy as an adaptation to unpredictable environmental conditions. These two species were only found in allopatry, likely due to competition for critical resources like sleeping sites. The smaller M. lehilahytsara co-occurred with M. jonahi and M. macarthurii potentially by adjusting its niche to avoid competition with these larger-bodied species. We hypothesize that heterothermy allowed M. jonahi and M. simmonsi to persist in lowland habitats during cold phases of the Pleistocene but that it did not promote co-occurrence. In contrast, M. lehilahytsara may have lost lowland distributions due to a lower capacity to deposit fat. Our findings require further testing but provide a plausible explanation for a complex distributional pattern of sympatric and allopatric occurrences in northeastern Madagascar.","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"58 4","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/btp.70225","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148237609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Increased Unripe-to-Ripe Fruit Ratios Within Bicolored Displays Enhance Interactions With Avian Frugivores 在双色显示中增加未成熟与成熟果实的比例增强了与鸟类食果动物的相互作用

IF 1.7 3区环境科学与生态学

Biotropica Pub Date : 2026-06-07 DOI: 10.1111/btp.70226

João Vitor S. Messeder

引用次数: 0

IF 1.7 3区环境科学与生态学

Biotropica Pub Date : 2026-05-14